588 lines
19 KiB
Java
588 lines
19 KiB
Java
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package org.mariotaku.dynamicgridview;
|
|
|
|
import android.animation.Animator;
|
|
import android.animation.AnimatorListenerAdapter;
|
|
import android.animation.ObjectAnimator;
|
|
import android.animation.TypeEvaluator;
|
|
import android.animation.ValueAnimator;
|
|
import android.content.Context;
|
|
import android.graphics.Bitmap;
|
|
import android.graphics.Canvas;
|
|
import android.graphics.Color;
|
|
import android.graphics.Paint;
|
|
import android.graphics.Rect;
|
|
import android.graphics.drawable.BitmapDrawable;
|
|
import android.util.AttributeSet;
|
|
import android.util.DisplayMetrics;
|
|
import android.view.MotionEvent;
|
|
import android.view.View;
|
|
import android.view.ViewTreeObserver;
|
|
import android.widget.AbsListView;
|
|
import android.widget.AdapterView;
|
|
import android.widget.ListAdapter;
|
|
import android.widget.ListView;
|
|
|
|
/**
|
|
* The dynamic listview is an extension of listview that supports cell dragging
|
|
* and swapping.
|
|
*
|
|
* This layout is in charge of positioning the hover cell in the correct
|
|
* location on the screen in response to user touch events. It uses the position
|
|
* of the hover cell to determine when two cells should be swapped. If two cells
|
|
* should be swapped, all the corresponding data set and layout changes are
|
|
* handled here.
|
|
*
|
|
* If no cell is selected, all the touch events are passed down to the listview
|
|
* and behave normally. If one of the items in the listview experiences a long
|
|
* press event, the contents of its current visible state are captured as a
|
|
* bitmap and its visibility is set to INVISIBLE. A hover cell is then created
|
|
* and added to this layout as an overlaying BitmapDrawable above the listview.
|
|
* Once the hover cell is translated some distance to signify an item swap, a
|
|
* data set change accompanied by animation takes place. When the user releases
|
|
* the hover cell, it animates into its corresponding position in the listview.
|
|
*
|
|
* When the hover cell is either above or below the bounds of the listview, this
|
|
* listview also scrolls on its own so as to reveal additional content.
|
|
*/
|
|
public class DynamicListView extends ListView {
|
|
|
|
private final int SMOOTH_SCROLL_AMOUNT_AT_EDGE = 15;
|
|
private final int MOVE_DURATION = 150;
|
|
private final int LINE_THICKNESS = 15;
|
|
|
|
private int mLastEventY = -1;
|
|
|
|
private int mDownY = -1;
|
|
private int mDownX = -1;
|
|
|
|
private int mTotalOffset = 0;
|
|
|
|
private boolean mCellIsMobile = false;
|
|
private boolean mIsMobileScrolling = false;
|
|
private int mSmoothScrollAmountAtEdge = 0;
|
|
|
|
private final int INVALID_ID = -1;
|
|
private long mAboveItemId = INVALID_ID;
|
|
private long mMobileItemId = INVALID_ID;
|
|
private long mBelowItemId = INVALID_ID;
|
|
|
|
private BitmapDrawable mHoverCell;
|
|
private Rect mHoverCellCurrentBounds;
|
|
private Rect mHoverCellOriginalBounds;
|
|
|
|
private final int INVALID_POINTER_ID = -1;
|
|
private int mActivePointerId = INVALID_POINTER_ID;
|
|
|
|
private boolean mIsWaitingForScrollFinish = false;
|
|
private int mScrollState = OnScrollListener.SCROLL_STATE_IDLE;
|
|
|
|
/**
|
|
* Listens for long clicks on any items in the listview. When a cell has
|
|
* been selected, the hover cell is created and set up.
|
|
*/
|
|
private final AdapterView.OnItemLongClickListener mOnItemLongClickListener = new AdapterView.OnItemLongClickListener() {
|
|
@Override
|
|
public boolean onItemLongClick(final AdapterView<?> arg0, final View arg1, final int pos, final long id) {
|
|
mTotalOffset = 0;
|
|
|
|
final int position = pointToPosition(mDownX, mDownY);
|
|
final int itemNum = position - getFirstVisiblePosition();
|
|
|
|
final View selectedView = getChildAt(itemNum);
|
|
mMobileItemId = getAdapter().getItemId(position);
|
|
mHoverCell = getAndAddHoverView(selectedView);
|
|
selectedView.setVisibility(INVISIBLE);
|
|
|
|
mCellIsMobile = true;
|
|
|
|
updateNeighborViewsForID(mMobileItemId);
|
|
|
|
return true;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* This TypeEvaluator is used to animate the BitmapDrawable back to its
|
|
* final location when the user lifts his finger by modifying the
|
|
* BitmapDrawable's bounds.
|
|
*/
|
|
private final static TypeEvaluator<Rect> sBoundEvaluator = new TypeEvaluator<Rect>() {
|
|
@Override
|
|
public Rect evaluate(final float fraction, final Rect startValue, final Rect endValue) {
|
|
return new Rect(interpolate(startValue.left, endValue.left, fraction), interpolate(startValue.top,
|
|
endValue.top, fraction), interpolate(startValue.right, endValue.right, fraction), interpolate(
|
|
startValue.bottom, endValue.bottom, fraction));
|
|
}
|
|
|
|
public int interpolate(final int start, final int end, final float fraction) {
|
|
return (int) (start + fraction * (end - start));
|
|
}
|
|
};
|
|
|
|
/**
|
|
* This scroll listener is added to the listview in order to handle cell
|
|
* swapping when the cell is either at the top or bottom edge of the
|
|
* listview. If the hover cell is at either edge of the listview, the
|
|
* listview will begin scrolling. As scrolling takes place, the listview
|
|
* continuously checks if new cells became visible and determines whether
|
|
* they are potential candidates for a cell swap.
|
|
*/
|
|
private final AbsListView.OnScrollListener mScrollListener = new AbsListView.OnScrollListener() {
|
|
|
|
private int mPreviousFirstVisibleItem = -1;
|
|
private int mPreviousVisibleItemCount = -1;
|
|
private int mCurrentFirstVisibleItem;
|
|
private int mCurrentVisibleItemCount;
|
|
private int mCurrentScrollState;
|
|
|
|
/**
|
|
* Determines if the listview scrolled up enough to reveal a new cell at
|
|
* the top of the list. If so, then the appropriate parameters are
|
|
* updated.
|
|
*/
|
|
public void checkAndHandleFirstVisibleCellChange() {
|
|
if (mCurrentFirstVisibleItem != mPreviousFirstVisibleItem) {
|
|
if (mCellIsMobile && mMobileItemId != INVALID_ID) {
|
|
updateNeighborViewsForID(mMobileItemId);
|
|
handleCellSwitch();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines if the listview scrolled down enough to reveal a new cell
|
|
* at the bottom of the list. If so, then the appropriate parameters are
|
|
* updated.
|
|
*/
|
|
public void checkAndHandleLastVisibleCellChange() {
|
|
final int currentLastVisibleItem = mCurrentFirstVisibleItem + mCurrentVisibleItemCount;
|
|
final int previousLastVisibleItem = mPreviousFirstVisibleItem + mPreviousVisibleItemCount;
|
|
if (currentLastVisibleItem != previousLastVisibleItem) {
|
|
if (mCellIsMobile && mMobileItemId != INVALID_ID) {
|
|
updateNeighborViewsForID(mMobileItemId);
|
|
handleCellSwitch();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onScroll(final AbsListView view, final int firstVisibleItem, final int visibleItemCount,
|
|
final int totalItemCount) {
|
|
mCurrentFirstVisibleItem = firstVisibleItem;
|
|
mCurrentVisibleItemCount = visibleItemCount;
|
|
|
|
mPreviousFirstVisibleItem = mPreviousFirstVisibleItem == -1 ? mCurrentFirstVisibleItem
|
|
: mPreviousFirstVisibleItem;
|
|
mPreviousVisibleItemCount = mPreviousVisibleItemCount == -1 ? mCurrentVisibleItemCount
|
|
: mPreviousVisibleItemCount;
|
|
|
|
checkAndHandleFirstVisibleCellChange();
|
|
checkAndHandleLastVisibleCellChange();
|
|
|
|
mPreviousFirstVisibleItem = mCurrentFirstVisibleItem;
|
|
mPreviousVisibleItemCount = mCurrentVisibleItemCount;
|
|
}
|
|
|
|
@Override
|
|
public void onScrollStateChanged(final AbsListView view, final int scrollState) {
|
|
mCurrentScrollState = scrollState;
|
|
mScrollState = scrollState;
|
|
isScrollCompleted();
|
|
}
|
|
|
|
/**
|
|
* This method is in charge of invoking 1 of 2 actions. Firstly, if the
|
|
* listview is in a state of scrolling invoked by the hover cell being
|
|
* outside the bounds of the listview, then this scrolling event is
|
|
* continued. Secondly, if the hover cell has already been released,
|
|
* this invokes the animation for the hover cell to return to its
|
|
* correct position after the listview has entered an idle scroll state.
|
|
*/
|
|
private void isScrollCompleted() {
|
|
if (mCurrentVisibleItemCount > 0 && mCurrentScrollState == SCROLL_STATE_IDLE) {
|
|
if (mCellIsMobile && mIsMobileScrolling) {
|
|
handleMobileCellScroll();
|
|
} else if (mIsWaitingForScrollFinish) {
|
|
touchEventsEnded();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
public DynamicListView(final Context context) {
|
|
super(context);
|
|
init(context);
|
|
}
|
|
|
|
public DynamicListView(final Context context, final AttributeSet attrs) {
|
|
super(context, attrs);
|
|
init(context);
|
|
}
|
|
|
|
public DynamicListView(final Context context, final AttributeSet attrs, final int defStyle) {
|
|
super(context, attrs, defStyle);
|
|
init(context);
|
|
}
|
|
|
|
/** Retrieves the position in the list corresponding to itemID */
|
|
public int getPositionForID(final long itemID) {
|
|
final View v = getViewForID(itemID);
|
|
if (v == null)
|
|
return -1;
|
|
else
|
|
return getPositionForView(v);
|
|
}
|
|
|
|
/** Retrieves the view in the list corresponding to itemID */
|
|
public View getViewForID(final long itemID) {
|
|
final int firstVisiblePosition = getFirstVisiblePosition();
|
|
final ListAdapter adapter = getAdapter();
|
|
for (int i = 0; i < getChildCount(); i++) {
|
|
final View v = getChildAt(i);
|
|
final int position = firstVisiblePosition + i;
|
|
final long id = adapter.getItemId(position);
|
|
if (id == itemID) return v;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* This method is in charge of determining if the hover cell is above or
|
|
* below the bounds of the listview. If so, the listview does an appropriate
|
|
* upward or downward smooth scroll so as to reveal new items.
|
|
*/
|
|
public boolean handleMobileCellScroll(final Rect r) {
|
|
final int offset = computeVerticalScrollOffset();
|
|
final int height = getHeight();
|
|
final int extent = computeVerticalScrollExtent();
|
|
final int range = computeVerticalScrollRange();
|
|
final int hoverViewTop = r.top;
|
|
final int hoverHeight = r.height();
|
|
|
|
if (hoverViewTop <= 0 && offset > 0) {
|
|
smoothScrollBy(-mSmoothScrollAmountAtEdge, 0);
|
|
return true;
|
|
}
|
|
|
|
if (hoverViewTop + hoverHeight >= height && offset + extent < range) {
|
|
smoothScrollBy(mSmoothScrollAmountAtEdge, 0);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public void init(final Context context) {
|
|
setOnItemLongClickListener(mOnItemLongClickListener);
|
|
setOnScrollListener(mScrollListener);
|
|
final DisplayMetrics metrics = context.getResources().getDisplayMetrics();
|
|
mSmoothScrollAmountAtEdge = (int) (SMOOTH_SCROLL_AMOUNT_AT_EDGE / metrics.density);
|
|
}
|
|
|
|
@Override
|
|
public boolean onTouchEvent(final MotionEvent event) {
|
|
|
|
switch (event.getAction() & MotionEvent.ACTION_MASK) {
|
|
case MotionEvent.ACTION_DOWN:
|
|
mDownX = (int) event.getX();
|
|
mDownY = (int) event.getY();
|
|
mActivePointerId = event.getPointerId(0);
|
|
break;
|
|
case MotionEvent.ACTION_MOVE:
|
|
if (mActivePointerId == INVALID_POINTER_ID) {
|
|
break;
|
|
}
|
|
|
|
int pointerIndex = event.findPointerIndex(mActivePointerId);
|
|
|
|
mLastEventY = (int) event.getY(pointerIndex);
|
|
final int deltaY = mLastEventY - mDownY;
|
|
|
|
if (mCellIsMobile) {
|
|
mHoverCellCurrentBounds.offsetTo(mHoverCellOriginalBounds.left, mHoverCellOriginalBounds.top
|
|
+ deltaY + mTotalOffset);
|
|
mHoverCell.setBounds(mHoverCellCurrentBounds);
|
|
invalidate();
|
|
|
|
handleCellSwitch();
|
|
|
|
mIsMobileScrolling = false;
|
|
handleMobileCellScroll();
|
|
|
|
return false;
|
|
}
|
|
break;
|
|
case MotionEvent.ACTION_UP:
|
|
touchEventsEnded();
|
|
break;
|
|
case MotionEvent.ACTION_CANCEL:
|
|
touchEventsCancelled();
|
|
break;
|
|
case MotionEvent.ACTION_POINTER_UP:
|
|
/*
|
|
* If a multitouch event took place and the original touch
|
|
* dictating the movement of the hover cell has ended, then the
|
|
* dragging event ends and the hover cell is animated to its
|
|
* corresponding position in the listview.
|
|
*/
|
|
pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
|
|
final int pointerId = event.getPointerId(pointerIndex);
|
|
if (pointerId == mActivePointerId) {
|
|
touchEventsEnded();
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return super.onTouchEvent(event);
|
|
}
|
|
|
|
@Override
|
|
public void setAdapter(final ListAdapter adapter) {
|
|
if (!(adapter instanceof DraggableAdapter))
|
|
throw new IllegalArgumentException("Adapter have to implement DraggableAdapter");
|
|
super.setAdapter(adapter);
|
|
}
|
|
|
|
/**
|
|
* dispatchDraw gets invoked when all the child views are about to be drawn.
|
|
* By overriding this method, the hover cell (BitmapDrawable) can be drawn
|
|
* over the listview's items whenever the listview is redrawn.
|
|
*/
|
|
@Override
|
|
protected void dispatchDraw(final Canvas canvas) {
|
|
super.dispatchDraw(canvas);
|
|
if (mHoverCell != null) {
|
|
mHoverCell.draw(canvas);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates the hover cell with the appropriate bitmap and of appropriate
|
|
* size. The hover cell's BitmapDrawable is drawn on top of the bitmap every
|
|
* single time an invalidate call is made.
|
|
*/
|
|
private BitmapDrawable getAndAddHoverView(final View v) {
|
|
|
|
final int w = v.getWidth();
|
|
final int h = v.getHeight();
|
|
final int top = v.getTop();
|
|
final int left = v.getLeft();
|
|
|
|
final Bitmap b = getBitmapWithBorder(v);
|
|
|
|
final BitmapDrawable drawable = new BitmapDrawable(getResources(), b);
|
|
|
|
mHoverCellOriginalBounds = new Rect(left, top, left + w, top + h);
|
|
mHoverCellCurrentBounds = new Rect(mHoverCellOriginalBounds);
|
|
|
|
drawable.setBounds(mHoverCellCurrentBounds);
|
|
|
|
return drawable;
|
|
}
|
|
|
|
/** Returns a bitmap showing a screenshot of the view passed in. */
|
|
private Bitmap getBitmapFromView(final View v) {
|
|
final Bitmap bitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
|
|
final Canvas canvas = new Canvas(bitmap);
|
|
v.draw(canvas);
|
|
return bitmap;
|
|
}
|
|
|
|
/** Draws a black border over the screenshot of the view passed in. */
|
|
private Bitmap getBitmapWithBorder(final View v) {
|
|
final Bitmap bitmap = getBitmapFromView(v);
|
|
final Canvas can = new Canvas(bitmap);
|
|
|
|
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
|
|
|
|
final Paint paint = new Paint();
|
|
paint.setStyle(Paint.Style.STROKE);
|
|
paint.setStrokeWidth(LINE_THICKNESS);
|
|
paint.setColor(Color.BLACK);
|
|
|
|
can.drawBitmap(bitmap, 0, 0, null);
|
|
can.drawRect(rect, paint);
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
/**
|
|
* This method determines whether the hover cell has been shifted far enough
|
|
* to invoke a cell swap. If so, then the respective cell swap candidate is
|
|
* determined and the data set is changed. Upon posting a notification of
|
|
* the data set change, a layout is invoked to place the cells in the right
|
|
* place. Using a ViewTreeObserver and a corresponding OnPreDrawListener, we
|
|
* can offset the cell being swapped to where it previously was and then
|
|
* animate it to its new position.
|
|
*/
|
|
private void handleCellSwitch() {
|
|
final int deltaY = mLastEventY - mDownY;
|
|
final int deltaYTotal = mHoverCellOriginalBounds.top + mTotalOffset + deltaY;
|
|
|
|
final View belowView = getViewForID(mBelowItemId);
|
|
final View mobileView = getViewForID(mMobileItemId);
|
|
final View aboveView = getViewForID(mAboveItemId);
|
|
|
|
final boolean isBelow = belowView != null && deltaYTotal > belowView.getTop();
|
|
final boolean isAbove = aboveView != null && deltaYTotal < aboveView.getTop();
|
|
|
|
if (isBelow || isAbove) {
|
|
|
|
final long switchItemID = isBelow ? mBelowItemId : mAboveItemId;
|
|
final View switchView = isBelow ? belowView : aboveView;
|
|
final int originalItem = getPositionForView(mobileView);
|
|
|
|
if (switchView == null) {
|
|
updateNeighborViewsForID(mMobileItemId);
|
|
return;
|
|
}
|
|
|
|
final int newItemPosition = getPositionForID(switchItemID);
|
|
((DraggableAdapter) getAdapter()).swapElements(originalItem, newItemPosition);
|
|
|
|
mDownY = mLastEventY;
|
|
|
|
final int switchViewStartTop = switchView.getTop();
|
|
|
|
mobileView.setVisibility(View.VISIBLE);
|
|
switchView.setVisibility(View.INVISIBLE);
|
|
|
|
updateNeighborViewsForID(mMobileItemId);
|
|
|
|
final ViewTreeObserver observer = getViewTreeObserver();
|
|
observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
|
|
@Override
|
|
public boolean onPreDraw() {
|
|
observer.removeOnPreDrawListener(this);
|
|
|
|
final View switchView = getViewForID(switchItemID);
|
|
|
|
mTotalOffset += deltaY;
|
|
|
|
final int switchViewNewTop = switchView.getTop();
|
|
final int delta = switchViewStartTop - switchViewNewTop;
|
|
|
|
switchView.setTranslationY(delta);
|
|
|
|
final ObjectAnimator animator = ObjectAnimator.ofFloat(switchView, View.TRANSLATION_Y, 0);
|
|
animator.setDuration(MOVE_DURATION);
|
|
animator.start();
|
|
|
|
return true;
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines whether this listview is in a scrolling state invoked by the
|
|
* fact that the hover cell is out of the bounds of the listview;
|
|
*/
|
|
private void handleMobileCellScroll() {
|
|
mIsMobileScrolling = handleMobileCellScroll(mHoverCellCurrentBounds);
|
|
}
|
|
|
|
/**
|
|
* Resets all the appropriate fields to a default state.
|
|
*/
|
|
private void touchEventsCancelled() {
|
|
final View mobileView = getViewForID(mMobileItemId);
|
|
if (mCellIsMobile) {
|
|
mAboveItemId = INVALID_ID;
|
|
mMobileItemId = INVALID_ID;
|
|
mBelowItemId = INVALID_ID;
|
|
mobileView.setVisibility(VISIBLE);
|
|
mHoverCell = null;
|
|
invalidate();
|
|
}
|
|
mCellIsMobile = false;
|
|
mIsMobileScrolling = false;
|
|
mActivePointerId = INVALID_POINTER_ID;
|
|
}
|
|
|
|
/**
|
|
* Resets all the appropriate fields to a default state while also animating
|
|
* the hover cell back to its correct location.
|
|
*/
|
|
private void touchEventsEnded() {
|
|
final View mobileView = getViewForID(mMobileItemId);
|
|
if (mCellIsMobile || mIsWaitingForScrollFinish) {
|
|
mCellIsMobile = false;
|
|
mIsWaitingForScrollFinish = false;
|
|
mIsMobileScrolling = false;
|
|
mActivePointerId = INVALID_POINTER_ID;
|
|
|
|
// If the autoscroller has not completed scrolling, we need to wait
|
|
// for it to
|
|
// finish in order to determine the final location of where the
|
|
// hover cell
|
|
// should be animated to.
|
|
if (mScrollState != OnScrollListener.SCROLL_STATE_IDLE) {
|
|
mIsWaitingForScrollFinish = true;
|
|
return;
|
|
}
|
|
|
|
mHoverCellCurrentBounds.offsetTo(mHoverCellOriginalBounds.left, mobileView.getTop());
|
|
|
|
final ObjectAnimator hoverViewAnimator = ObjectAnimator.ofObject(mHoverCell, "bounds", sBoundEvaluator,
|
|
mHoverCellCurrentBounds);
|
|
hoverViewAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
|
|
@Override
|
|
public void onAnimationUpdate(final ValueAnimator valueAnimator) {
|
|
invalidate();
|
|
}
|
|
});
|
|
hoverViewAnimator.addListener(new AnimatorListenerAdapter() {
|
|
@Override
|
|
public void onAnimationEnd(final Animator animation) {
|
|
mAboveItemId = INVALID_ID;
|
|
mMobileItemId = INVALID_ID;
|
|
mBelowItemId = INVALID_ID;
|
|
mobileView.setVisibility(VISIBLE);
|
|
mHoverCell = null;
|
|
setEnabled(true);
|
|
invalidate();
|
|
}
|
|
|
|
@Override
|
|
public void onAnimationStart(final Animator animation) {
|
|
setEnabled(false);
|
|
}
|
|
});
|
|
hoverViewAnimator.start();
|
|
} else {
|
|
touchEventsCancelled();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stores a reference to the views above and below the item currently
|
|
* corresponding to the hover cell. It is important to note that if this
|
|
* item is either at the top or bottom of the list, mAboveItemId or
|
|
* mBelowItemId may be invalid.
|
|
*/
|
|
private void updateNeighborViewsForID(final long itemID) {
|
|
final int position = getPositionForID(itemID);
|
|
final ListAdapter adapter = getAdapter();
|
|
mAboveItemId = adapter.getItemId(position - 1);
|
|
mBelowItemId = adapter.getItemId(position + 1);
|
|
}
|
|
} |